Prepare to release version v26.5.1

[github-actions]

Update the version number for releasing the latest version of Quark.
In this version, the following changes will be included.

• Add new Quark rules for TrickMo malware detection #909
• PyEval._invoke silently skips IndexError in certain pipeline #867
• Fix #867: Separate filled-new-array parsing from invoke-kind #886
• Add new Quark rules for Arsink malware detection  #907
• Update smoke test CI with new behavior counts  #908
• Bump pygments from 2.19.2 to 2.20.0 #897
• Bump black from 26.1a1 to 26.3.1 #884
• Add new Quark rules for Antidot malware detection #903
• Update smoke test CI with new behavior counts  #905